31400406072 has 48 divisors (see below), whose sum is σ = 97191734640. Its totient is φ = 8971544448.

The previous prime is 31400406061. The next prime is 31400406091. The reversal of 31400406072 is 27060400413.

31400406072 is a `hidden beast` number, since 3 + 14 + 0 + 0 + 40 + 607 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31150693 + ... + 31151700.

It is an arithmetic number, because the mean of its divisors is an integer number (2024827805).

Almost surely, 2^31400406072 is an apocalyptic number.

It is an amenable number.

31400406072 is an abundant number, since it is smaller than the sum of its proper divisors (65791328568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31400406072 is a wasteful number, since it uses less digits than its factorization.

31400406072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62302412 (or 62302405 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

Adding to 31400406072 its reverse (27060400413), we get a palindrome (58460806485).

The spelling of 31400406072 in words is "thirty-one billion, four hundred million, four hundred six thousand, seventy-two".